Sawmill-carriage setworks



Feb. l0, 1925. .Y 4 1,525,714

H. F. BIEDERMANN sAwMlLL CARRIAGE sE'rwoRKs Filed May 10, i924 i 2 sheets-ShenV 1 invente? Jadefhww eid.

Feb. 10, 1925. 1,525,714

H. F. BIEDERMANN A sAwmLL CARRIAGE sETwoRKs Filed May 10, 1924 2 Sheets-Sheet 2 Patented Feb. 10, 1925.

i `UNITED STATES HUGO F. BIEDERMANN, 0F TUSCALOOSA, ALABAMA..

SAWMILL-CARRIAGE SETIVORKS.

Application filed May 10,

To all whom t may concern.'

Be it known that I, I-IUGo F. BIEDERMANN, a citizen of the United States, residing at Tuscaloosa, in the county of Tuscaloosa and State of Alabama, have invented certain new and useful Improvements in SawmilLCai1- riage Setworks, of which the following is a specification.

This invention relates to a sawmill carriage set works, and particularly to a conn struction adapted to leffect a tensioning or snubbing action between the set shaft and the knee and the individual adjusting means for the knee in order to eliminate all slack and lost motion between these parts.

In this art it is important in securing straight or accurate sawing to avoid any slack between the setting parts which would result in displacement of `the knee in the operation of the saw, and such slack or lost motion is commonly due to loose connections and wear of movable members which defeat a firm and accurate adjustment of the knees both from the set shaft and for the individual adjusting lever therefor. The lost motion due to this slack rapidly increases in the use of the set works, due to friction, and frequently becomes such an element as to permit a definite movementof the knee in the cutting action of the saw upon the, timber, which defeats a straight out and also the object of the individual adjusting leverI by which a finer adjust-ment of the knees independently of the set shaft is effected.

For the purpose of obviating these objections in the practical operation of a sawmill set works I have provided a flexible connection extending from the setting shaft to the adjusting lever for the knee, with means for maintaining this connection under a constant and even tension as it is fed from the set shaft during the movement of the knee in the successive cutting operations. Such a connection effectually retains the adjusting lever and its latch in close contact while all of the slack between the setting rack and its pinion is taken up so that the parts when adjusted are firmly and accurately held.

The invention has for an object to provide a novel and improved construction of sawmill set Works in which a flexible connection extends from the set shaft on the carriage to the individual adjusting lever for the 1924. Serial No. 712,446.

knee, together with means for maintaining said connection under a constant tension.

A further object of the invention is to provide an improved construction of the tensioning means adapted to be mounted upon the head block and comprising a cylinder having a piston projected therefrom and carrying av sheave over which the flexible connection between the parts is eX- tended.

Another object of the invention is to provide an improved construction of. cuff adapted for adjustable mounting upon the adjusting lever so as to maintainthe latch member in intimate contact with the lever and through the cooperation of the tension device with said lever in constant contact with one of the engaging walls of the sector with which the latch cooperates.

Other objects and advantages of the invention will be hereinafter set forth and the novel features thereof defined by the appended claims.

In the drawings Figure 1 is an elevation of the head block and knee setting mechanism with parts broken away and in section;

Figure 2 is a longitudinal section through the tensioning device;

Figure 3 is a top plan thereof showing the connection with the setting shaft;

Figure 4 is an elevation of the attaching cuff with the upper portion in section;

Figure 5 is a section on the line 5 5 of' Figure 4; and

Figure 6 is a similar view on the line 6--6 of Figure 4.

Like numerals refer to like parts through.- out the several figures of the drawings.

The invention may be applied to any desired type of sawmill carriage or head block and in its present application the carriage 10 is provided with a head block 1l which carries a setting shaft 12 provided with the usual pinion 13 which cooperates with the rack teeth 14 of the sliding rack 15 by which the knee 16 is adjusted. The adjustment of all of the knees is simultaneously effected through this connection in the usual manner.

The present invention provides for an independent adjustment of each knee relative to the rack so as to effect an individual action thereof in properly aligning the timber to be cut. This is necessary where (ill inclined faces are encountered as it is often desirable, to set one, knee at a diilerent position from the'othersj particularly in removing the outer slab or layer 'from a log and in compensating for a. previously irregularly sawed surface. This individual adjustment is eilected by means of lever pivotally mounted at 18 upon the rearward extension 19 of the knee and having iVV lower end connected by a link Q() to pointQl upon the rack l5. This reci; being held in its set position permits an indepr l ent-sliding adjustment of the knee thei ,L through the connection described.

The tensioning device v-,fith which the present invention 1s primarily concerned consists of a flexible connection 2Q of any desired character, such as the chain which extends from a drum 93 lupon the shaft 12 to a tension lever 24 mounted upon the same pivotal axis 1% as the adjusting lever 17. rlhe loiver end of this lever is provided with a series of connecting apertures 26 by which the end portion 27 oi" the ilexible connection may be adjusted upon the tension lever When the parts areasseinbled.

The winding drum 23 upon the shalt l2 maybe of any preferred character and herein shown as provided with spiral ways by which overlapping of the chain layers is prevented and an even feed secured therefrom.

The tension device applied to the flexible connection 22 may be of any preferred character, a desirable form being herein shoivn as comprising a cylinder 2S having a piston member 29 at the outer end or which a Wheel or sheave 30 is pivotally mounted at 31 and over which the connection 22 passez. For i'naintaining a proper tension a coil c spring 32 is disposed Within the cylinder and bears against the piston menber and also the head .33 applied to the c vlin For the purposeoic adjusting` this is and limiting the movement in the expansie of the spring, a threaded shank i--l e-:tenr from the piston through said spring aL head Where an adjusting nut is applied lVhile a spring member has been shown iter providing the tension, it u'ill'be obvious that lluid pressure could be used Vfor the same purpose.

For the purpose oil attaching the tension lever 24 to the adjusting lever l? post il@ is extended from the lever l? and forms a pivotal connection for the upper end or" the tension lever 24. The adjusting lev fr is surrounded by a cull1 37 which encloses the same and also the latch member 23S which cooperates with the notched or toothed tor 39. rThis culi' carries at the opposite side from the latch a block a0 in which set screws il are threaded so that when properly adjusted the latch is drawn into firm contact with the face of the adjusting lever and also and its pinion and also betr-:een the individual adjusting levers and their cameotions. Then the parts are asfenibied the adjusting -nut upon the shank oi the member is threaded into contact will head until the desired tension is cstabll in the spring` member and the flexible gonnection adjusted to a tight position upon the tension lever. yl"his nut is then threaded oil a sullicient distance to permit the proper play er length oi' travel of the piston and the cull properly set upon theA adji. t.; lever to prevent any lost motion in tl'ie latch connection.

As the knee is successively advanced the flexible connection is univonnd from the set shaft and passing over the sheave the parts are constantly' maintained under an equal tension so that a yieldingoi the knee through pressure or other causes is L cally prevented ivhile the knee may be vidually adjusted upon the rack tlc g the adjusting lever to the desired extent to effect a true cut of the timber. lt .vill be observed that the construction is such that in the advance et the knee a constant tension is maintained while ment the chain slack is l ting shaft so that a preliminai the parts at the proper tension Yfor their continued operation.

1While the specilic construction of the adj sting lever and the lle: 'ble connections have been shown and described, still tl c invention is not conlined thereto chan and alterations may be made without departing from the spirit thereof as detincd by the following claims.

Having thus described my invention, what l claim as neiv and desire to secure by Letters Patent is:

l. ln a seivmill set vvorks the combination oi.l a head block, a set shall, a rack slidablj' mounted on said heat block and geared to s id set shalt, a setting linee slidably mounted on said rack and adjustably connected therewith, a lever for ii'idepeudently adjusting said knee, and a Flexible ension connection exteiulin5,; Yfrom the set lait to said lever.

2. ln a. sawmill set worlisr the Combination of a head block, a set shalt, a rack slidhul ably mounted on said head block and geared to`said setshaft, a setting knee slidably mounted on said rack and adjust-ably connected therewith, a lever for independently adjusting said knee, a tension lever connected to said adjusting lever, a flexible connection extending from the set shaft to said tension lever, and a tensioning device acting upon said connection.

3. ln a sawmill set works, the combination of a head block, a set shaft,a rack slidably mounted on said head block and geared to said set shaft, a setting knee slidably mounted on said rack and adjustably connected therewith, a lever for independently adjusting said knee, a connection extending from said set shaft to said lever, and a tension cylinder provided with a piston member' having a sheave over which said connection passes.

a. In a sawmill set works, the combination of a head block, a set shaft, a rack slidably mounted on said head block and geared to said set shaft, a setting knee slidably mounted on said rack and adjustably connected therewith, a lever for independently adjusting said knee, a connection extending from said set shaft to said lever, a tension cylinder provided with a piston member having a sheave over which said connection passes, and a tension spring within said cylinder for projecting saidsheave.

5. In a sawmill set works, the combination of a head block, a set shaft, a rack slidably mounted on said head block and geared to said set shaft, a setting knee slidably mounted on said rack and adjustably connected therewith, a lever for independentlyY adjusting` said knee, a flexible connection between said set shaft and lever, a tension device comprising a cylinder provided with a piston member carrying at one end a sheave over which the connection passes and at its opposite end a threaded shank, a head for said cylinder, a spring disposed between said head and piston member, and an adjustable nut mounted upon said shank to engage said head when establishing the tension of said spring action.

fo'. In a sawmill set works, the combina-V tion of a head block, a set shaft, a rack slidably mounted on said head block and geared to said set shaft, a setting knee slidably mounted on said rack and adjustably connected therewith, a lever for independently adjusting said knee, a flexible connection from said shaft to said lever, a tension device over which said connection travels, and means for adjusting the tension of said device and limiting its expansive action.

7. In a sawmill set works, the combination with a head block, a set shaft provided with a 'winding drum, a rack slidably mounted on said head block and geared to said set shaft, a setting knee slidably mounted on said rack, a lever pivoted upon the knee for effecting an independent adjustment thereof, a flexible connection extending from the drum upon the set shaft and adjustably connected to said lever, and a tension device for constantly compensating for slack in said connection.

8. ln a sawmill set works, the combination of a head block, a set shaft, a setting knee, a looped connection between said set shaft and knee, and tension means acting upon the loop of said connection to maintain a constant tension and avoid slack therein.

9. ln a sawmill set works, a knee mounted upon the head block for rack and pinion adjustment thereon from a set shaft, an individual adjusting lever pivoted upon the knee and connected to said rack, means for holdingsaid lever at its adjusted positions, a flexible connection extending from the set shaft to said lever for adjustable connection thereto, and a tension device carried by the head block and disposed to engage said connection intermediate the set shaft and adjusting lever.

lO. ln a sawmill set works, the combination of a head block, a set shaft, a setting knee adjustably connected therewith, means for independently adjusting said knee, and means for maintaining a constant tension between the set shaft and said independent adjusting means.

1l. ln a sawmill set works, the combination of a head block, a set shaft, a rack slidably mounted on said headblock and geared to said set shaft, a setting knee slidably mounted on said rack and adjustably connected thereto, a lever pivotally mounted on the knee for adjusting the saine relative to said rack, a tension lever pivoted upon the anis of the adjusting lever and connected thereto at its upper end, a holding sector supported by said knee, a cud adjustably mounted upon the adjusting lever, and a latch extending through said cuff.

l2. ln a sawmill set works, the combination of a head block, a set shaft, a rack slidably mounted on said head block and geared to said set shaft, a setting knee slidably mounted on said rack and adjustably connected thereto, a lever pivotally mounted on the knee for adjusting the same relative to said rack, a tension lever pivoted upon the anis of the adjusting lever and connected thereto at its upper end, a holding sector` supported by said knee, a cud adjustably mounted upon the adjusting lever, a latch extending through said cuff, a block carried by said cuff, and a set screw mounted in said block to engage the adjusting lever and draw said latch into contact therewith.

ln testimony whereof l affix my signa- HUGO F. BIEDERMANN.

ture. 

